import java.util.Random;

//不接收参数的方法
   /* public class MenAri {
    //心算能力训练
    //public static boolean confirm(){


    //}re

    public static void main(String[] args) {
        Random rand=new Random();
        System.out.println("心算能力训练:");
    do {
            int x=rand.nextInt(900)+100;
            int y=rand.nextInt(900)+100;
            int z=rand.nextInt(900)+100;

            System.out.println(x+);
        }while (confirm());

    }

}
*/